Number of ways to reciprocally link elements of an n X 5 array either to themselves or to exactly one king-move neighbor.

A220641

Number of ways to reciprocally link elements of an n X 5 array either to themselves or to exactly one king-move neighbor.

Terms

    a(0) =1a(1) =8a(2) =728a(3) =37320a(4) =2226936a(5) =128171936a(6) =7444342896a(7) =431408410784

External references